Android Room – simple select query – Cannot access database on the main thread
I am trying a sample with Room Persistence Library. I created an Entity: @Entity public class Agent { @PrimaryKey public String guid; public … Read more
kotlin
What Java 8 Stream.collect equivalents are available in the standard Kotlin library?
In Java 8, there is Stream.collect which allows aggregations on collections. In Kotlin, this does not exist in the same way, other than … Read more
`break` and `continue` in `forEach` in Kotlin
Kotlin has very nice iterating functions, like forEach or repeat, but I am not able to make the break and continue operators work … Read more
Kotlin : Public get private set var
What is the correct way to define a var in kotlin that has a public getter and private (only internally modifiable) setter? 2 … Read more
Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0
I’ve got a gradle FAILURE: …”Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0.” Case description: Attached to … Read more
IllegalArgumentException: navigation destination xxx is unknown to this NavController
I am having an issue with the new Android Navigation Architecture component when I try to navigate from one Fragment to another, I … Read more
How to convert List to Map in Kotlin?
For example I have a list of strings like: val list = listOf(“a”, “b”, “c”, “d”) and I want to convert it to … Read more
Accessing Kotlin extension functions from Java
Is it possible to access extension functions from Java code? I defined the extension function in a Kotlin file. package com.test.extensions import com.test.model.MyModel … Read more
What does the suspend function mean in a Kotlin Coroutine?
I’m reading Kotlin Coroutine and know that it is based on suspend function. But what does suspend mean? Coroutine or function gets suspended? … Read more
What’s the Kotlin equivalent of Java’s String[]?
I see that Kotlin has ByteArray, ShortArray, IntArray, CharArray, DoubleArray, FloatArray, which are equivalent to byte[], short[], int[],char[], double[], float[] in Java. Now … Read more